<?php
    $file = $_FILES['file']['name'];
    $a = pathinfo($file);
    $basename = $a['basename'];
    $filename = $a['filename'];
    $extension = $a['extension'];
    $path = $_SERVER['DOCUMENT_ROOT'].'/up/images/'; # set upload directory
    $dest = $path.$basename;
    if(file_exists($dest))
    {
        $b = count(glob($path.$filename.'*.'.$extension))+1; # all matches + 1
        for($i = 1; $i < $b; $i++)
        {
            if(!file_exists($path.$filename.$i.'.'.$extension))
            {
                move_uploaded_file($_FILES['file']['tmp_name'],$path.$filename.$i.'.'.$extension);
            }
        }
    }
    else
    {
        move_uploaded_file($_FILES['file']['tmp_name'],$dest);
    }
    ?>